找到你今天要练的题。

Data set A consists of 10 positive integers less than 60.The list shown gives 9 of the integers from data set A.
43,45,44,43,38,39,40,46,40
The mean of these 9 integers is 42.If the mean of data set A is an integer that is greater than 42, what is the value of the largest integer from data set A?

Each value in the data set shown represents the height, in centimeters, of a plant.
6,10,13,2,15,22,10,4,4,4
What is the mean height, in centimeters, of these plants?

Value	Data set A frequency	Data set B frequency
30	2	9
34	4	7
38	5	5
42	7	4
46	9	2

Data set A and data set B each consist of 27 values. The table shows the frequencies of the values for each data set. Which of the following statements best compares the means of the two data sets?

The box plots summarize the masses, in kilograms, of two groups of gazelles. Based on the box plots, which of the following statements must be true?

Two data sets of 23 integers each are summarized in the histograms shown. For each of the histograms, the first interval represents the frequency of integers greater than or equal to 10, but less than 20. The second interval represents the frequency of integers greater than or equal to 20, but less than 30, and so on. What is the smallest possible difference between the mean of data set A and the mean of data set B?

Data set X:5,9, 9, 13
Data set Y:5, 9, 9, 13, 27
The lists give the values in data sets X and Y. Which statement correctly compares the mean of data set X and the mean of data set Y?

Data set A consists of the heights of 75 buildings and has a mean of 32 meters. Data set B consists of the heights of 50 buildings and has a mean of 62 meters. Data set C consists of the heights of the 125 buildings from data sets A and B. What is the mean, in meters, of data set C?

Five Eretmochelys imbricata, a type of sea turtle, each have a nest. The table shows an original data set of the number of eggs that each turtle laid in its nest.

A sixth nest with 121 eggs is added to create a new data set, Which of the following correctly compares the means of the two data sets?

Two data sets of 23 integers each are summarized in the histograms shown. For each of the histograms, the first interval represents the frequency of integers greater than or equal to 10, but less than 20. The second interval represents the frequency of integers greater than or equal to 20, but less than 30, and so on. What is the smallest possible difference between the mean of data set A and the mean of data set B?

73, 74, 75, 77, 79, 82, 84, 85, 91
What is the median of the data shown?

Each of the following frequency tables represents a data set. Which data set has the greatest mean?

The mean amount of time that the 20 employees of a construction company have worked for the company is 6.7 years. After one of the employees leaves the company, the mean amount of time that the remaining employees have worked for the company is reduced to 6.25 years. How many years did the employee who left the company work for the company?